Therefore, together, the results of this H. arabidopsidis assay series showed that only Ath-AGO1 is involved in the H. arabidopsidis infection process and that other Arabidopsis AGO proteins do not play a role in H. arabidopsidis sRNA-directed expression regulation of Arabidopsis genes upon H. arabidopsidis infection. This evidence concerns the gene FBXW7 and infection.